Fluorescence Microscope Illumination Device LED Modules
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Solution Overview
Problem
Conventional fluorescence microscopy illumination systems using short-arc lamps are inefficient, generate excessive heat, and have limited service life, while existing LED-based systems face challenges with mechanical movement and vibration during wavelength changes and require complex cooling systems.
Innovation Solution
A compact fluorescence microscopy arrangement using a housing with multiple light-emitting diodes, dichroic splitters, and a common logical control device for optical coupling and wavelength management, allowing for efficient and vibration-free wavelength switching without mechanical movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If short-arc lamps are used for illumination, then continuous spectrum coverage is achieved, but efficiency is low and heat generation is excessive
Solution Approach 1:
The illumination system is segmented into multiple independent LED modules, each emitting at specific wavelengths. This allows selective activation of only the wavelengths needed for the current fluorescence filter set, improving energy efficiency while reducing heat generation compared to continuous-spectrum lamps.
Solution Approach 2:
The system changes the spectral parameters by switching between different LED modules with specific wavelength characteristics. This enables precise matching of excitation wavelengths to the required fluorescence filters, achieving high efficiency with minimal heat generation at each operational state.
2Adaptability or versatility
If mechanical wavelength switching is used, then wavelength selection is achieved, but vibrations and mechanical complexity increase
Solution Approach 1:
The mechanical wavelength switching mechanism is replaced with an electronic control system that activates specific LED modules based on the required wavelength. This eliminates mechanical movements and vibrations while maintaining full wavelength selection capability through electronic signal control.
Solution Approach 2:
The system dynamically switches between different LED modules through electronic control signals, allowing rapid wavelength changes without mechanical inertia. This dynamic electronic switching provides versatile wavelength selection while avoiding the mechanical complexity and vibrations associated with physical filter rotation or movement.
3Adaptability or versatility
If multiple LEDs are combined, then illumination coverage is improved, but heat management becomes more complex
Solution Approach 1:
The LED array is segmented into multiple independently controllable modules, each responsible for specific wavelength ranges. This segmentation allows selective operation of individual modules based on the required excitation spectrum, reducing the thermal load on any single module and simplifying heat management while maintaining broad spectral coverage capability.
Solution Approach 2:
The system uses periodic or intermittent activation of specific LED modules rather than continuous operation of all LEDs. This periodic action pattern allows heat to dissipate from inactive modules while maintaining illumination coverage, reducing overall thermal management complexity compared to continuous full-spectrum operation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution provides a compact, efficient, and stable illumination system that reduces mechanical vibrations and heat generation, enabling rapid and precise wavelength switching with improved light intensity control, thus enhancing the performance of fluorescence microscopy.
Implementation Method 1
a plurality of light-emitting diodes arranged in the housing
Implementation Method 2
light-emitting diodes for illumination of a specimen
Implementation Method 3
at least one dichroic splitter disposed in the housing, the at least one splitter and the light-emitting diodes spatially being disposed with respect to one another so that the directed light fluxes are combinable via the at least one splitter
Implementation Method 4
the sample itself, or a fluorescing dye with which the sample is stained, emits longer-wave fluorescent light (primary or secondary fluorescence) upon excitation with the short-wave excitation radiation
Data Source
AI summary
An arrangement for fluorescence microscopic examination of specimens includes: a fluorescence microscope; an illumination device that includes: a housing including an interface configured to optically couple the housing and the fluorescence microscope; a plurality of light-emitting diodes disposed in the housing; a respective collector disposed downstream of each of the light emitting diodes and configured to generate a directed light flux; and at least one dichroic splitter disposed in the housing, the at least one splitter and the light-emitting diodes being spatially disposed with respect to one another so that the directed light fluxes are combinable via the at least one splitter into a common illumination beam path directed onto the interface; and a logical control device common to the fluorescence microscope and the illumination device.